308 vebbenacejE. (vervain family.) 



3. STACHYTARPHA, Vahl. 



Calyx tubular, compressed, 5-toothed. Corolla salver-shaped, 5-cleft, hairy 

 in the throat. Stamens 4, didynamous, the upper pair sterile. Ovary 2-celled. 

 Stigma capitate. Fruit of two 1 -celled 1 -seeded nutlets. — Herbs or shrubs, with 

 4-angled forking stems, and opposite undivided leaves. Flowers in straight and 

 rigid spikes, imbedded in excavations of the thickened rachis, and covered by 

 the imbricated bracts. 



1. S. Jamaicensis, Vahl. Herbaceous, smoothish ; stems ascending; 

 leaves oblong, coarsely serrate, tapering into a slender margined petiole ; spikes 

 linear, terete, elongated ; bracts lanceolate, acuminate, appressed, with scarious 

 rough margins; flowers small, blue. — South Florida. — Leaves 2' -4' long. 

 Spikes 8'- 12' long. 



4. LIPPIA, L. 



Calyx tubular, membranaceous, 2-4-toothed. Corolla tubular-funnel-shaped, 

 somewhat bilabiate; 5-cleft. Stamens 4, didynamous, included. Ovary 2-celled, 

 2-ovulcd. Style short: stigma obliquely capitate. Fniit of two 1 -seeded sepa- 

 rable nutlets. — Herbs, with 4-angled stems, opposite or whorled simple leaves, 

 and small tlowers in dense spikes or heads. 



1. L. nodiflora, Michx. Stem creeping, finely pubescent, the flowering 

 branches erect ; leaves obovate, oblong, or lanceolate, rough, tapering and entire 

 below the middle, serrate above ; heads dense, globose in flower, oblong or 

 cylindrical in fruit, on axillary peduncles which are 2-3 times as long as the 

 leaves; flowers white or purple. (Zapania nodiflora, Lam.) — Damp sandy 

 soil near the coast, Florida to Mississippi, and northward. May - Sept. — 

 Flowering stems 6'- 12' high. Leaves 1' long. 



5. IiANTANA, L. 



Calyx minute, slightly 4-toothed. Corolla bilabiate ; the upper lip notched 

 or entire ; the lower 3-lobed. Stamens 4, didynamous, included. Style short : 

 stigma oblique. Fruit fleshy or beiTy-like, of two mostly rugose or tubereulate 

 1-seeded nutlets, enclosed in the enlarged membranaceous calyx. — Shrubs, with 

 simple rugose serrate leaves, and axillary peduncled capitate bracted flowers. 



1. L. involucrata, L. Var. Floridana. Stem much branched, pu- 

 bescent; leaves small (J'- 1'), oval or obovate, crenate, rounded at the apex, 

 densely pubescent when young, at length rough above, contracted into a slender 

 petiole; peduncles 2-3 times as long as the leaves, the upper ones corymbose; 

 heads small; bracts ovate, as long as the tube of the small (2" -3") white? 

 corolla ; the outer ones empty and narrower, involucrate. — South Florida. 



2. L. Camara, L. Stem pubescent, hirsute, or spiny; leaves ovate- 

 oblong, acuminate, crenate, short-petioled, very rough abov4, pubescent beneath; 

 peduncles as long as the leaves ; bracts lanceolate, half as long as the tube of the 

 yellow corolla; involucre none. — St. Mary's, Georgia, jBffio«. June -Nov. — 

 Shrub 2° - 4° high. Leaves 2' long. 



